Apparatus for starting internal-combustion engines.



C. UNTERBERG. APPARATUS FOR STARTING INTERNAL COMBUSTION ENGINES.

APPLICATION FILED MAR. 26, I912.

Patented Mar. 3, 1914.

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UNITED STATES PATENT OFFICE.

GUSTAV UNTERBERG, 0F DURLACH, GERMANY.

APPARATUS FOR STARTING INTERNALCOMBUSTION EN GINES.

Specification of Letters Patent.

Application filed March 26, 1912.

Patented Mar. 3, 1914. Serial No. 686,273.

T 0 all whom it may concern Be it known that 'I, GUSTAV UNTERBERG,engineer, a citizen of the German Empire, residing at Durlach, Baden,Germany, have invented certain new and useful Improvements in Apparatusfor Starting Internal- Combustion Engines, of which the following is aspecification.

Apparatus for starting internal combustion engines from the drivers seatare in themselves known. These are arranged so that the armature of thedynamo electric generator for the ignition of the internal combustionengine is driven, by a device for accelerating the armature, set inoperation or released from the drivers seat, in the magnetic field at asuitable speed in order to produce an igniting spark in the cylinderwhich in the position of rest of the engine is on compression andcontains some of the mixture of gas and air. In order to insure thatthese arrangements will work with certainty it is naturally necessarythat some explosive mixture be present in the cylinder and further thatthismixture be under the highest possible pressure. However, experienceshows that in very many cases, the fast moving piston as well as thevalves, because of their incessant movements in the operation of theengine, do not remain long in a condition for retaining the explosive mxture under pressure while the engine is at rest, if the valves andpiston are very eflicient in the normal operation of the engine. Now inorder to render this unavoidable leakage of the piston and valvesharmless,

" according to this invention, reservoirs are joined to each explosioncylinder with in termediate back pressure valves which by means ofregulating members are actuated from outside so that the passages to thereservoirs are closed while the engine is working; the passages are openupon the stopping of the engine and upon the interruption of theignition by the release of the back pressure valve for the compressedmixture. Again upon the starting of the engine before or during therelease of the ignition'apparatus the passages are freely connected tothe cylinder. As these closing members and back pressure valves onlycome into operation upon the starting and stopping of the engine theycan afford a reliable gas tight joint for a suflicient length of time.By closing the passages between the reservoirs and the explosioncylinders by means of a cock or by fixing the back pressure valve, adisadvantageous compression space may be avoided. By connecting thecontrolling rod for the cock between the reservoir and the explosioncylinder to the controlling rods for the throttle and the ignition it ispossible to operate the engine in a simple manner by a single handle atthe drivers seat and at the same time to obtain the necessary energy forstarting the engine and further to release this energy at the same timeby a single movement of the ignition lever. The size of the reservoirsmust entirely depend upon the volume of the cylinder. It need only be ofa limited size for large cylinders. Also this arrangement can be carriedout so that for all the cylinders only a single reservoir is necessary.Instead of a back pressure valve which is shut when the engine isworking, is open when the engine and ignition is cut off, and isreleased when the engine is started up, any other equivalent device maybe employed.

In the accompanying drawings, the back pressure valve is combined with aclosing cock which looks the passages between the reservoirs andcylinders when the engine is working, opens the passages from the valveswhen the engine is switched off and releases the valves when the engineis started up.

Figure 1 is a broken side elevation of the controlling mechanism of amotor car with ignition apparatus and explosion cylinders with thereservoirs according to the inven tion. Figs. 2 and 3 arecentralvertical sectional views taken transversely and longitudinally,respectively, of the engine and showing the valves in the passagebetween the reservoir and cylinder.

a, b, c, d, are the cylinders with the sparking plugs e, f, g and it.

2' is a magneto ignition apparatus provided With an auxiliary devicewhich is arranged in a manner, in itself known, between the armature andthe armature driving shaft and has an armature accelerating device whichon switching in the ignition apparatus is wound up and released to drivethe armature.

70, Z, m, n are the bottle shaped reservoirs. In the passages 0 betweenthese bottles and the cylinders a, b, 0, (Z, as is shown in Figs. 2 and3, the back pressure valves formed of ordinary balls p and a cock 9 arearranged. As is shown in Fig. 1, all the cooks g are arnism is as'followsz-As soon ranged on a common spindle 1 which is operated throughthe driving rod 8. This rod is fastened to the control ing rod t for theignition ap aratus.

The met 0d of working of this mechaas the ignitlon apparatus forthe'running engine is switched off from the drivers seat through thecontrol wheel a by means of the rods b which at the same time, asalready descri ed, the armature starting device in the ignitionapparatus i is wound up, the passage 0 from the reservoirs is, Z, m,nare opened by means necessary to operate the controlling member u atthe drivers seat. By this means the drive of the ignition apparatus i isreleased and at the same time the cocks g are operated through the rod 8and the spindle r so I that the upper edge of the plug in the cook thatthe back q pushes up the ball 7) as is seen in Figs. 2 and 3. This putsthe spaces in the reservoirs k, Z, m, n in communication with thecylinders a, b, c, d, for a moment and then the cock 9 shuts the passage0 again, of course, either at the seat of the back pressure valve p orat the opposite opening of the plug in the cock. Thus it is by thisarrangement of passages that opening and closing is effected by twomovements of the cock 9 and by the movement from open position to closedposition the back pressure valve is pushed up. The construction of thiscontrolling mechanism may be varied for it is only necessary pressurevalve is closed during the operation of the engine, is open during thestopping of the engine and is pushed open during the starting of theengine. In the present case the cock serves as a controlling member andduring the running of the engine it also acts to close the passage 0.

It is obvious that the reservoirs for the cylinders are also to beemployed in other arrangements for starting up internal combustionengines and, of course, especially for those in which the ignitionapparatus for the production of sparks is drivenfrom a device at thedrivers seat.

Claims.

1. Apparatus for starting internal coinbustion engines consisting of areservoir connected to each cylinder of the engine, back pressure valvesarranged in the passages between said reservoirs and cylinders ,to openand means for controlling said valves, whereby they are closed durin therunning of the engine and opened during the starting and stoppingthereof.

2. Apparatus for starting internal combustion engines back pressurevalves arranged in the passages between said reservoirs and cylindersand means for controlling said valves connected to the ignitioncontrolling .devices, whereby said valves are closed during the runningof the engine and opened during the starting and stopping thereof.

3. Apparatus for starting internal combustion engines consisting of areservoir connected to each cylinder of the engine, automatic valvesinterposed between said reservoirs and cylinders, and valves adaptedcommunication between the cylinders and the reservoirs to allow thelatter to be charged.

4. Apparatus for starting internal combustion engines consisting of areservoir connected tov each cylinder of the engine, automatic valvesinterposed between said reservoirs and said cylinders, valves adapted toopen communication between the cylinders and the reservoirs to allow thelatter to be charged and means for opening the automatic valves to allowthe compressed gas to escape into the cylinders of the motors.

5. Apparatus for starting internal combustion engines consisting of areservoir connected to each cylinder of the engine, automatic valvesinterposed between said cylinders and said reservoirs, valves adapted toopen communication between the cylinders and the reservoirs to allow thelatter to be charged, and means for controlling the last named valveswhereby they are closed during the running of the engine and openedduring the starting and stopping thereof.

6. Apparatus for starting internal comconsistlng of a reservoirconnected to each cylinder of the engine,

bustion engines consisting of a reservoir

